Flexible multi-purpose integrated RF/shim coil array for MRI and localized B₀ shimming.

Area of Science:

• Magnetic Resonance Imaging (MRI)
• Coil Array Technology
• Biomedical Engineering

Background:

• Developing advanced MRI coils is crucial for improving image quality and diagnostic accuracy.
• Existing rigid coil arrays often lack adaptability to diverse anatomical structures, limiting their effectiveness and subject comfort.

Purpose of the Study:

• To engineer a flexible, lightweight, multi-purpose integrated parallel reception, excitation, and shimming (iPRES) coil array.
• To achieve high signal-to-noise ratio (SNR) and effective localized B0 shimming across various anatomical regions.
• To enhance ease of positioning and subject comfort during MRI procedures.

Main Methods:

• A four-channel flexible iPRES coil array was fabricated, allowing simultaneous RF and direct current flow for imaging and shimming.
• Shimming performance and versatility were tested on healthy subjects' knees and necks.
• The flexible coil's SNR and shimming efficacy in the knee were compared against a rigid coil array.

Main Results:

• Flexible iPRES coil shimming reduced B0 RMSE by 50.1% (1st-order) and 40.5% (2nd-order) in the knee and neck, significantly reducing DWI distortions.
• A rigid coil provided only a 29.6% B0 RMSE reduction for the knee.
• The rigid coil also resulted in a 58.7% decrease in SNR compared to the flexible coil.

Conclusions:

• The flexible iPRES coil array demonstrates superior adaptability to anatomical regions compared to rigid arrays.
• It offers enhanced SNR, shimming performance, positioning ease, and subject comfort.
• This technology holds significant potential for diverse applications across the human body.